Foundation pile static load test settlement measurement plane device
By designing a foundation pile static load test settlement measurement plane device fixed with hoops and anti-slip bolts and combined with pile heating pipes, the problems of pile body damage and economicality during foundation pile settlement measurement in the prior art are solved, and efficient and accurate settlement measurement is achieved, and suitable for cold environments.
Patent Information
- Application Number
- CN202520708258.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2035-04-15
AI Technical Summary
The prior art can easily cause pile body damage during the settlement measurement process of foundation pile static load test and is not economical.
A plane device for static load test settlement measurement of foundation piles was designed, and the test pile was fixed on the test pile using a combination of clamping hoops and anti-slip bolts, avoiding the traditional welding or hole-punching fixing method, and the clamping expansion body was heated through the clamping heating pipe to ensure stable connection in cold environments.
The device reduces environmental pollution, simplifies construction processes, improves work efficiency, reduces inspection costs and time, ensures observation accuracy, and is suitable for cold environment areas.
Smart Images
Figure CN222990809U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anchor pile method detection, and more specifically, to a plane device for measuring settlement in the static load test of foundation piles. Background Technique
[0002] At present, two methods are usually adopted for the settlement measurement plane:
[0003] For piles not wrapped by steel casings, usually 4 holes are symmetrically drilled on the pile side by an electric drill, steel bars are respectively inserted and fixed with planting glue, and small iron sheets are welded at the other ends of the steel bars as the displacement observation plane for supporting the displacement gauge. This method causes slight damage to the pile body. During the experiment, due to the large force on the pile body, it may cause damage to the pile head, especially for semi-rigid piles with a small pile diameter such as CFG piles.
[0004] For concrete piles wrapped by steel plates, usually steel bars are welded at the observation points, and horizontal small iron sheets are welded at the other ends of the steel bars as the displacement reference plane. This method has certain requirements for welding quality, and the horizontal degree of the small iron sheets is not easy to control on site, which has high requirements for the level of welders and low economy. In view of this, we propose a plane device for measuring settlement in the static load test of foundation piles. Summary of the Invention
[0005] The purpose of the utility model is to overcome the deficiencies of the prior art, meet the actual needs, and provide a plane device for measuring settlement in the static load test of foundation piles to solve the technical problems of easy damage to the pile body and low economy in the current detection process.
[0006] To solve the above technical problems, the utility model provides the following technical solution: A plane device for measuring settlement in the static load test of foundation piles, including a test pile, a bearing plate is arranged above the test pile, a pile-holding structure is arranged on the outer periphery of the bearing plate, four symmetrically protruding displacement observation points are arranged on the pile-holding structure, two connecting rods arranged horizontally and vertically are arranged at the displacement observation points, the horizontal connecting rod is fixed to the displacement observation point, a bidirectional guide tube is sleeved on the outer periphery of the connecting rod, a compression bolt is threadedly fixed between the connecting rod and the bidirectional guide tube, and a settlement observation platform is connected to the top end of the connecting rod.
[0007] Preferably, the pile-holding structure includes two hoops, the hoops are semi-circular structures, convex ears are integrally formed at both ends of the hoops, and a tightening bolt is connected between two adjacent convex ears.
[0008] Preferably, anti-slip bolts are threadedly fixed between the outer periphery of the hoop and the test pile, and one end of the anti-slip bolt contacts and presses against the test pile.
[0009] Preferably, the pile-holding structure further includes a groove opened on the hoop, and a pile-fixing member and an anti-freezing pile-holding member are arranged on the inner periphery of the groove.
[0010] Preferably, the pile fixing member is composed of pile fixing racks symmetrically distributed on both sides, a pile fixing semi-gear, and a pile fixing head. The pile fixing racks are located on the inner circumference of the groove. A pile fixing semi-gear is meshed with the outer circumference of the pile fixing racks. A pile fixing head is installed on one semi-circle of the pile fixing semi-gear. A rubber layer is bonded to the outer circumference of the pile fixing head. One side of the pile fixing head is closely attached to the outer circumference of the test pile.
[0011] Preferably, the cold-resistant pile holding member includes a pile holding expansion body. The pile holding expansion body is located in the central area of the groove. The side of the pile holding expansion body is closely attached to the pile fixing racks. A pile holding through rod penetrates through one end of the pile holding expansion body, and the pile holding through rod penetrates into the pile fixing racks.
[0012] Preferably, the pile fixing racks are provided with cavities for accommodating the pile holding through rod, and the end of the pile holding through rod contacts the inner wall of the cavity. A pile holding ring plate is slidably limited at the outer peripheral end of the pile holding through rod, and the outer circumference of the pile holding ring plate presses tightly against the inner wall of the cavity.
[0013] Preferably, pile holding expansion protrusions are integrally formed on the outer circumference of the pile holding expansion body. The pile holding expansion protrusions fill the inner area of the cavity. An arc-shaped pile holding heating pipe is arranged on one side of the pile holding expansion body.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0015] 1. The present utility model is fixed on the test pile by adopting a combination of a hoop and an anti-slip bolt, avoiding the traditional fixing methods of welding or punching holes, without the need to use materials such as planting glue, reducing environmental pollution, and at the same time reducing complex construction procedures, significantly improving work efficiency. The device is simple to install, and each component is detachable and can be reused repeatedly, saving costs and time during the detection process, improving resource utilization rate, and solving the problems of easy damage to the pile body and low economy during the detection process.
[0016] 2. The present utility model also heats the pile holding expansion body through the pile holding heating pipe to make it expand, thereby pushing the pile fixing racks, and driving the pile fixing head to be more stably fixed to the test pile through the pile fixing semi-gear, effectively avoiding the influence of cold shrinkage caused by cold weather on the connection stability between the device and the test pile, ensuring the accuracy of observation. At the same time, a rubber layer is bonded to the outer circumference of the pile fixing head, which can not only increase friction but also protect the surface of the test pile. When the pile fixing head is displaced under force, the pile holding through rod will move accordingly, pushing another pile fixing rack, making the two-sided pile fixing heads clamp the test pile more tightly and generate constraints, further improving the stability of the device in cold conditions, ensuring the accuracy of settlement observation, and making it applicable to cold environmental areas, further solving the problems of easy damage to the pile body and low economy during the detection process. Description of the Drawings
[0017] Figure 1 Structural schematic diagram of the first embodiment of the present utility model;
[0018] Figure 2 In the present utility model Figure 1 Cross-sectional structural schematic diagram in the A-A direction;
[0019] Figure 3 Structural schematic diagram of the hoop in the second embodiment of the present utility model;
[0020] Figure 4 Half-sectional structural schematic diagram of the hoop in the second embodiment of the present utility model;
[0021] Figure 5 Overall cooperation state diagram of the internal structure of the hoop in the second embodiment of the present utility model.
[0022] Description of reference numerals in the figure: 1, test pile; 2, bearing plate; 3, pile-holding structure; 5, bidirectional guide pipe; 6, connecting rod; 7, compression bolt; 8, settlement observation platform; 9, anti-slip bolt; 301, hoop; 302, tightening bolt; 33, pile-fixing member; 331, pile-fixing rack; 332, pile-fixing semi-gear; 333, pile-fixing head; 34, cold-resistant pile-holding member; 341, pile-holding expansion body; 342, pile-holding through rod; 343, pile-holding ring plate; 344, pile-holding expansion protrusion; 345, pile-holding heating pipe. Specific implementation mode
[0023] As Figures 1 to 5As shown in the figure, the present utility model relates to a plane device for measuring the settlement of a static load test of a foundation pile, which includes a test pile 1. Above the test pile 1, there is a bearing plate 2. Around the bearing plate 2, there is a pile-holding structure 3. The pile-holding structure 3 includes two hoops 301. The hoops 301 are semi-circular structures. At both ends of the hoops 301, there are integrally formed protruding ears. Between two adjacent protruding ears, there is a tightening bolt 302. In order to strengthen the stability with the test pile 1, eight holes are evenly arranged on the two semi-circular hoops 301, and the eight holes are locked with anti-slip bolts 9 to prevent the device from loosening and slipping during the test. One end of the anti-slip bolt 9 contacts and presses against the test pile 1. On the hoops 301, there are four symmetrically protruding displacement observation points, and the displacement observation points are located at a position 200 mm below the pile top. In this way, the traditional fixing methods of welding or punching are avoided, environmental pollution is reduced, and work efficiency is improved. The displacement observation points are provided with two connecting rods 6 arranged horizontally and vertically. The horizontal connecting rod 6 is fixed to the displacement observation point. A bidirectional guide tube 5 is sleeved on the outer periphery of the connecting rod 6. A compression bolt 7 is threadedly fixed between the connecting rod 6 and the bidirectional guide tube 5. The top end of the connecting rod 6 is connected to a settlement observation platform 8. Through the connecting rod 6, the observation point is led to a position above the pile top. Through the action of the bidirectional guide tube 5, the connecting rod 6 can be adjusted up and down and can be adjusted in distance from the pile body, providing the best placement position for the displacement sensor.
[0024] Among them, for the two semi-circular hoops 301: Different models of semi-circular hoops 301 need to be formulated according to different pile diameters. The diameter of the hoop 301 is the same as the pile diameter. The width of the hoop 301 is 100 mm, the wall thickness is 5 mm, and the material is selected as stainless steel material, which has good corrosion resistance and strength. The outer diameter of the protruding observation point at the hoop 301 is 30 mm, the inner diameter is 15 mm, and the protruding height is 50 mm.
[0025] Among them, the bidirectional guide tube 5 and the two connecting rods 6 are made of aluminum-zinc alloy 7075, which has high hardness, high strength, wear resistance, good corrosion resistance and oxidation resistance, and relatively light quality; the diameter of the two connecting rods 6 is 14 mm and the length is 500 mm, and the settlement observation platform 8 can be adjusted to a position above the bearing plate 2 for easy observation. The diameter of the settlement observation platform 8 is 50 mm.
[0026] Working principle: During the test, first mark the position 200 mm below the pile top. Subsequently, fix the two semi-circular hoops 301 with the tightening bolts 302. Insert the horizontal connecting rod 6 at the positions of the four protruding displacement observation points reserved on the semi-circular hoops 301 and fix it with the compression bolt 7. Subsequently, install the bidirectional guide tube 5 and the vertical connecting rod 6. After adjusting the settlement observation platform 8 on the vertical connecting rod 6 to a suitable position, fix the compression bolt 7 on the bidirectional guide tube 5. Finally, tighten the anti-slip bolts 9 for reinforcement. This device is simple to install and can be reused, which can save costs and time during the detection process, improve the displacement observation accuracy through non-destructive installation, and reduce environmental pollution.
[0027] Second Embodiment. Further, for use in cold conditions, to avoid cold shrinkage in cold conditions, which may lead to a decrease in the accuracy of observations, the pile-holding structure 3 includes a hoop 301 and a tightening bolt 302. The structures of the hoop 301 and the tightening bolt 302 are the same as those described above. Moreover, the pile-holding structure 3 further includes grooves formed in the hoop 301. The number of grooves is multiple and they are distributed at equal intervals. A pile-fixing member 33 and a cold-resistant pile-holding member 34 are provided on the inner circumference of the grooves.
[0028] The pile-fixing member 33 is composed of pile-fixing racks 331 symmetrically distributed on both sides, a pile-fixing semi-gear 332, and a pile-fixing head 333. The pile-fixing racks 331 are located on the inner circumference of the grooves. The outer circumference of the pile-fixing racks 331 meshes with the pile-fixing semi-gear 332. A pile-fixing head 333 is installed on one semi-circle of the pile-fixing semi-gear 332. A rubber layer is bonded to the outer circumference of the pile-fixing head 333. One side of the pile-fixing head 333 is in close contact with the outer circumference of the test pile 1. The cold-resistant pile-holding member 34 includes a pile-holding expansion body 341. The pile-holding expansion body 341 is located in the central area of the groove. The pile-holding expansion body 341 is made of a material with a relatively high expansion coefficient. One side of the pile-holding expansion body 341 is in close contact with the pile-fixing rack 331. A pile-holding through rod 342 penetrates through one end of the pile-holding expansion body 341. The pile-holding through rod 342 penetrates into the pile-fixing rack 331. The pile-fixing rack 331 is provided with a cavity for accommodating the pile-holding through rod 342, and the end of the pile-holding through rod 342 contacts the inner wall of the cavity. A pile-holding ring plate 343 is slidably limited at the outer peripheral end of the pile-holding through rod 342. The outer circumference of the pile-holding ring plate 343 presses against the inner wall of the cavity. An integrally formed pile-holding expansion protrusion 344 is provided on the outer circumference of the pile-holding expansion body 341. The pile-holding expansion protrusion 344 fills the inner area of the cavity. An arc-shaped pile-holding heating pipe 345 is provided on one side of the pile-holding expansion body 341. The pile-holding heating pipe 345 can be selected from existing heating pipes or heating wires. The heating temperature of the pile-holding heating pipe 345 is the same as the expansion temperature of the pile-holding expansion body 341, and it is connected to an external mobile power supply through wiring to achieve power supply. Its switch can be remotely controlled or directly set at a convenient operation position on the top.
[0029] Working principle: By controlling the operation of the pile-holding heating pipe 345 through an external control structure to achieve heating, the pile-holding expansion body 341 expands when heated, and the pile-holding expansion protrusions 344 on the outer periphery of the pile-holding expansion body 341 expand, which will push the pile-holding ring plate 343, giving a tightening force to the pile-fixing rack 331. Cooperating with the meshing of the pile-fixing semi-gear 332 and the pile-fixing rack 331, the pile-fixing head 333 can be fixed to the test pile 1 more stably, avoiding cold shrinkage caused by cold weather. At the same time, the end of the pile-holding through rod 342 contacts the inner wall of the cavity. When the pile-fixing head 333 is deflected by force, the pile-fixing semi-gear 332 will rotate to a certain extent, and the pile-fixing rack 331 will move up and down. At this time, the pile-holding through rod 342 will move and push another pile-fixing rack 331. Also, since the pile-fixing head 333 engaged with the other pile-fixing rack 331 also fits with the test pile 1, it is clamped tighter and restricted, further improving the stability in cold conditions and ensuring the accuracy of observation.
[0030] The embodiments disclosed in the present utility model are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present utility model based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present utility model, they are within the protection scope of the present utility model.
Claims
1. A planar device for measuring the settlement of pile foundation static load test, characterized in that: The invention comprises a test pile (1), wherein a pressure plate (2) is arranged above the test pile (1), a pile holding structure (3) is arranged on the periphery of the pressure plate (2), four symmetrically raised displacement observation points are arranged on the pile holding structure (3), the displacement observation points are provided with two connecting rods (6) arranged horizontally and vertically, the connecting rods (6) are fixed to the displacement observation points in the transverse direction, a bidirectional guide tube (5) is sleeved on the periphery of the connecting rod (6), a clamping bolt (7) is threadedly fixed between the connecting rod (6) and the bidirectional guide tube (5), and a settlement observation platform (8) is connected to the top of the connecting rod (6).
2. A planar device for measuring the settlement of pile foundation static load test according to claim 1, characterized in that: The pile holding structure (3) comprises two holding hoops (301), the holding hoops (301) are semicircular structures, protruding ears are integrally formed at both ends of the holding hoops (301), and tightening bolts (302) are connected between two adjacent protruding ears.
3. A planar device for measuring the settlement of pile foundation static load test according to claim 2, characterized in that: An anti-slip bolt (9) is threadedly fixed between the outer periphery of the clamp (301) and the test pile (1), and one end of the anti-slip bolt (9) contacts and presses against the test pile (1).
4. A planar device for measuring the settlement of pile foundation static load test according to claim 2, characterized in that: The pile-holding structure (3) further comprises a groove formed on the holding hoop (301), and a pile-fixing member (33) and a cold-resistant pile-holding member (34) are arranged on the inner periphery of the groove.
5. A planar device for measuring the settlement of pile foundation static load test according to claim 4, characterized in that: The pile fixing member (33) is composed of a pile fixing rack (331) symmetrically distributed on both sides, a pile fixing half gear (332) and a pile fixing head (333), the pile fixing rack (331) is located at the inner periphery of the groove, the pile fixing half gear (332) is meshed on the outer periphery of the pile fixing rack (331), the pile fixing head (333) is semicircularly mounted on one side of the pile fixing half gear (332), a rubber layer is bonded to the outer periphery of the pile fixing head (333), and one side of the pile fixing head (333) is tightly attached to the outer periphery of the test pile (1).
6. A planar device for measuring the settlement of pile foundation static load test according to claim 5, characterized in that: The cold-resistant pile-holding member (34) comprises a pile-holding expansion body (341), the pile-holding expansion body (341) is located in the central area of the groove, the side of the pile-holding expansion body (341) is in close contact with the pile-fixing rack (331), one end of the pile-holding expansion body (341) is penetrated by a pile-holding penetrating rod (342), and the pile-holding penetrating rod (342) penetrates the pile-fixing rack (331).
7. A planar device for measuring the settlement of pile foundation static load test according to claim 6, characterized in that: The pile-fixing rack (331) is provided with a cavity for accommodating a pile-holding through-rod (342), and the end of the pile-holding through-rod (342) contacts the inner wall of the cavity. A pile-holding ring plate (343) is provided at the outer peripheral end of the pile-holding through-rod (342) for limited sliding movement. The outer periphery of the pile-holding ring plate (343) is pressed tightly against the inner wall of the cavity.
8. A planar device for measuring the settlement of pile foundation static load test according to claim 7, characterized in that: The pile-holding expansion body (341) is integrally formed with a pile-holding expansion protrusion (344) on its outer circumference, and the pile-holding expansion protrusion (344) fills the inner area of the cavity. An arc-shaped pile-holding heating pipe (345) is provided on one side of the pile-holding expansion body (341).